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STATE OF ILLINOIS ADLAI E. Stevenson, Governor
TRANSACTIONS
OF THE
ILLINOIS STATE ACADEMY OF SCIENCE
VOLUME 43 1950
Forty-Third Annual Meeting
Rock Island, Illinois
May, 1950
printed by authority of the state of illinois
Illinois State Academy of Science affiliated with the Illinois State Museum Division, Centennial Building Springfield. Illinois December 31, 1950

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STATE OF ILLINOIS ADLAI E. Stevenson, Governor
TRANSACTIONS
OF THE
ILLINOIS STATE ACADEMY OF SCIENCE
VOLUME 43 1950
Forty-Third Annual Meeting
Rock Island, Illinois
May, 1950
printed by authority of the state of illinois
Illinois State Academy of Science affiliated with the Illinois State Museum Division, Centennial Building Springfield. Illinois December 31, 1950